Core-shell structured CuO-ZnO@H-ZSM-5 catalysts for CO hydrogenation to dimethyl ether

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• 作者：Renfeng Nie^a ; Hong Lei^a ; Saiyong Pan^a ; Lina Wang^b ; Jinhua Fei^a ; Zhaoyin Hou^a ; ^{zyhou@zju.edu.cn}
• 关键词：Core&ndash ; shell structure ; Homogeneous precipitation ; Syngas ; Dimethyl ether ; Bifunctional
• 刊名：Fuel
• 出版年：2012
• 期刊代码：33_00162361
• 类别：ce
• 出版时间：June, 2012
• 卷：96
• 期：Complete
• 页码：419-425
• 文件大小：788 K

摘要

A series of core-shell structured CuO-ZnO@H-ZSM-5 (CZ@H) catalysts were prepared by homogeneous precipitation through urea hydrolysis. This novel preparation procedure and excellent core-shell structure had contributed to its high-performance for CO hydrogenation under 260 掳C, 2.0 MPa and high space velocity (6000 mL/(g_-cat h). The space time yield of dimethyl ether (DME) over CZ@H(7.5) reached 0.76 g_-DME/g_-cat h with a 69.6%selectivity, and these values exceeded that of hybrid catalyst prepared by traditional mixing method (0.37 g_-DME/g_-cat h, 65.1%selectivity of DME). This high performance of bifunctional CZ@H catalysts could be attributed to the high Cu dispersion and well-defined core-shell structure.